Precessing jets in Sagittarius A - Gas dynamics in the central parsec of the galaxy

Details Precessing jets in Sagittarius A - Gas dynamics in the central parsec of the galaxy Precessing jets in Sagittarius A - Gas dynamics in the central parsec of the galaxy

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...262..110b&link_type=abstract

Astrophysical Journal, Part 1, vol. 262, Nov. 1, 1982, p. 110-119.

Astronomy and Astrophysics

Astronomy

34

Galactic Nuclei, Gas Dynamics, Interstellar Gas, Milky Way Galaxy, Plasma Jets, Radio Sources (Astronomy), Brightness Distribution, Infrared Spectroscopy, Precession, Radial Velocity, Very Large Array (Vla)

Scientific paper

The maps of 12.8 micrometer Ne II fine-structure line emission from the galactic center presented by Lacy et al. (1979, 1980) demonstrate that the ionized gas within the central parsec of the galaxy is moving in a highly supersonic manner. Lacy et al. (1980) concluded that the ionized gas was dynamically in circular rotation about the galactic center in a disklike configuration. The high resolution Very Large Array (VLA) map of the galactic center obtained by Brown et al. (1981) provides also information concerning the low surface brightness emission. This emission suggests a different interpretation for the dynamics of the ionized gas at the galactic center. Specifically, the radio contours exhibit an S-shaped symmetry about the galactic center that is one important signature of a precessing twin-nozzle jet such as has been proposed to explain the radio structure of NGC 315 and NGC 326. The present investigation is concerned with an interpretation of the radio structure of the galactic center on the basis of such a twin-jet model.

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